apache: break-out CONFIGURE_ARGS, add layout

This gets rid of flags. For instance $(FPIC) shouldn't be forced onto
applications (see [1]).

And CONFIGURE_ARGS + CONFIGURE_VARS are broken out of Build/Configure.
This way more arguments can be added easily in the future.

The target is changed from apache to apache2 (which is used by upstream
by default). the CONFIGURE_ARGS are changed where need to enable
modules.

This also renames one patch that fixes scoreboard location (the name
004-pidfile_fix.patch didn't describe what it's doing).

Now with the OpenWrt layout in place 003-logdir_fix.patch can be
removed.

[1] https://wiki.gentoo.org/wiki/Project:Hardened/Position_Independent_Code_internals

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

net/apache/patches/004-fix-scoreboard-location.patch

@@ -0,0 +1,11 @@
+--- a/include/scoreboard.h
++++ b/include/scoreboard.h
+@@ -40,7 +40,7 @@ extern "C" {
+ 
+ /* Scoreboard file, if there is one */
+ #ifndef DEFAULT_SCOREBOARD
+-#define DEFAULT_SCOREBOARD "logs/apache_runtime_status"
++#define DEFAULT_SCOREBOARD "log/apache2/apache_runtime_status"
+ #endif
+ 
+ /* Scoreboard info on a process is, for now, kept very brief ---